This thread is 9+ years old. The original poster hasn't logged in since 2016.What ever ended up happening? I am also considering doing this, but with mantellas and Neon or Yellow-Headed day geckos. I'm planning on using a 24×18×36 Exoterra.
Mixing species is heavily discouraged on this forum. It brings zero benefit to the animals, only risks. While your terrarium may sound large, it is a tiny fraction of the space that either of those species would use in the wild.
Given that this thread is ancient, I am locking it.